检索结果-南通市图书馆

In situ self-nucleophilic synthesis of nano-Li_(4)Ti_(5)O_(12)/reduced graphite oxide composite with mesopore-oriented porous structure for high-rate lithium ion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2022年第9期29卷 2911-2929页

作者： PAN Feng-ling ming Hai CAO gao-ping ZHANG Ting-ting ZHANG Wen-feng XIANG Yu Research Institute of Chemical Defense Beijing 100191China Beijing Key Laboratory of Advanced Chemical Energy Storage Technology and Materials Beijing 100191China School of Chemical Engineering Beijing University of Chemical TechnologyBeijing 100029China

It is the core to improve the electron/ion transfer features of Li_(4)Ti_(5)O_(12) for achieving high-rate anode in lithium ion *** directly using graphite oxide powder,nano-Li_(4)Ti_(5)O_(12)/reduced graphite oxide composite with mesopore-oriented porosity is prepared through one-pot facile ball-milling method in this *** mechanism underlying the self-nucleophilic effect of oxygen-containing functional groups in graphite oxide is *** can intercalate into graphite oxide bulk and in-situ generate ***,graphite oxide with nanoparticles generated inside can obtain a mesopore-oriented porous structure under ***,the synergistic effects of Li_(4)Ti_(5)O_(12) nanoparticles and mesopore-oriented porosity strengthen composites with rapid Li^(+)diffusion and electron conductive *** obtained optimal LTO/GO-1.75 composite displays excellent high-rate capability(136 mA·h/g at 7000 mA/g)and good cycling stability(a capacity retention of 72%after 1000 cycles at 7000 mA/g).Additionally,the reactants concentration in this demonstrated strategy is as high as 30 wt%−40 wt%,which is over 6 times that of traditional methods with GO *** means that the strategy can significantly increase the yield,showing big potential for large-scale production.

关键词： graphite oxide nucleophilic catalysis Li_(4)Ti_(5)O_(12) high rate anode

粒径和含结合酚不溶性膳食纤维对白芸豆皮体外发酵特性的影响

在线全文

学校读者我要写书评

暂无评论

食品工业科技 2024年第1期45卷 118-127页

作者：金姝张斌高彤扶雄黄强华南理工大学食品科学与工程学院广东广州510640 广州酒家集团利口福食品有限公司广东广州511445

为揭示不同粒径的白芸豆皮和含结合酚不溶性膳食纤维的体外发酵规律,本研究以白芸豆皮(WS)为原料,经过连续酶法提取得到含结合酚不溶性膳食纤维(IB),采用普通粉碎和超微粉碎方法对其进行改性,获得不同粒径分布的两组样品,利用扫描电子... 详细信息

为揭示不同粒径的白芸豆皮和含结合酚不溶性膳食纤维的体外发酵规律,本研究以白芸豆皮(WS)为原料,经过连续酶法提取得到含结合酚不溶性膳食纤维(IB),采用普通粉碎和超微粉碎方法对其进行改性,获得不同粒径分布的两组样品,利用扫描电子显微镜和激光共聚焦扫描显微镜对其微观形貌进行观察,并通过体外发酵实验和16S rRNA测序探究两组样品的酵解特性及其对肠道菌群组成丰度的影响。实验结果发现样品粒径越小,结合酚越均匀地分散于颗粒表面。WS和IB都具有慢发酵性,且其发酵速率和产酸量均随着粒径的减小而提高,菌群组成分析发现粒径越小的底物对Bacteroides丰度的促进效果也越显著,但是Lachnospira显示出了对较大粒度底物的偏好。结果表明IB可以促进Bacteroides、Bifidobacterium和Ruminococcaceae ruminococcus等有益菌的相对丰度,改善肠道微生物群的组成结构,其益生效应较相同粒径的WS更为显著。本研究可以为膳食纤维益生元效应的研究提供基础和方向,并可以指导膳食纤维的超微粉碎改性和白芸豆皮的综合利用。

关键词：白芸豆皮不溶性膳食纤维结合酚体外发酵超微粉碎粒径

Forming quality,mechanical properties,and anti-inflammatory activity of additive manufactured Zn–Nd alloy

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2020年第11期21卷 876-891页

作者： Ci-jun shuAI ming-li YANG Fang DENG You-wen YANG shu-ping PENG Fang-wei QI Chong-xian HE Li-da SHEN Hui-xin LIANG Institute of Biadditive Manufacturing Jiangxi University of Science and TechnologyNanchang 330013China State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha 410083China Shenzhen Institute of Information Technology Shenzhen 518172China Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology Nanjing University of Aeroncautics and AstronauticsNanjing 210016China School of Basic Medical Science Central South UniversityChangsha 410083China School of Energy and Machinery Engineering Jiangxi University of Science and TechnologyNanchang 330013China

Zinc(Zn)has recently been recognized as a promising bone repair material due to its inherent biodegradability and favorable *** this work,rare earth neodymium(Nd)was introduced into a Zn-based alloy fabricated using a laser powder bed fusion(LPBF)*** showed that addition of Nd significantly improved the melt fluidity and reduced the evaporation of Zn,thereby achieving parts with a high densification rate of 98.71%.Significantly,the Nd alloying treatment effectively refined the grain size from 25.3 to 6.2μ*** Zn5 eutectics precipitated and contributed to a second-phase strengthening *** a result,the tensile strength increased to(119.3±5.1)MPa and the Vickers hardness to(76.2±4.1).Moreover,the Zn–Nd alloy exhibited good anti-inflammatory activity,as the Nd ions released during degradation had a strong affinity with cell membrane phospholipids and consequently inhibited the release of inflammatory *** also presented favorable cytocompatibility,showing great potential as a bone repair material.

关键词： Zn–Nd alloy Laser powder bed fusion(LPBF) Anti-inflammatory activity Mechanical properties

Angular Distribution for ^(7)Be(d,n) ^(8)B Reaction at E_(c.m).=8.3MeV and the Astrophysical S_(l7)(0)Factor for ^(7)Be(p,γ) ^(8)B Reaction

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1999年第12期16卷 873-875页

作者： WANG You-bao LIU Wei-ping BAI Xi-xiang LI Zhi-chang LI An-li ZHOU shu-hua ZHU Xiao-feng LI Xiao-mei HE gao-kui GUO Gang LIAN Gang TANG Xiao-dong China Institute of Atomic Energy Beijing 1024131Cyclotron InstituteTexas A&M UniversityUSA

The differential cross section for 7Be(d,n)8B reaction at E_(c.m).=8.3 MeV has been measured by using a 7Be radioactive *** reaction cross section was determined to be 28±*** astrophysical Sl7(0)factor for the 7Be(p,γ)8B reaction was derived to be 24±5 eV b through the asymptotic normalization constant of)8B extracted from the experimental *** result is found to be consistent with a previous value obtained from the same reaction at Ec.m.=5.8 MeV,implying the energy independence of this indirect method within the uncertainty.

关键词： beam independence asymptotic

Features and variations of a radial artery approach in southern Chinese populations and their clinical significance in percutaneous coronary intervention

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2013年第6期126卷 1046-1052页

作者： LI Lang ZENG Zhi-yu ZHONG Ji-ming WU Xiang-hong ZENG shu-yi TANG Er-wen CHEN Wei SUN Yu-han Department of Cardiology First Affiliated Hospital of Guangxi Medical University Nanning Guangxi 530021 China

Background More and more percutaneous coronary intervention were done from radial artery approach. But the great limitation of radial artery approach and main failure cause of transradial coronary intervention is smaller size and more variations of a radial artery approach. The aim of the study is to explore the features and variations of a radial artery approach in southern Chinese populations and their clinical significance in percutaneous coronary intervention. Methods A total of 1400 patients who underwent scheduled first time transradial coronary angiography between July 2007 and September 2010 were enrolled. Radial arteriography was performed in all patients to detect the anatomical variations of this vessel. All patients＇ radial and ulnar artery inner diameters were measured using a computer assisted quantification method. A detailed patient history was recorded. Multivariate Logistic regression analysis was performed to evaluate the predictive value of variables （including age, gender, ethnicity, height, weight, body mass index, smoking, diabetes, hypertension and dyslipidemia） in arterial tortuosities and variations of this vessel. Results In southern Chinese populations, there were no significant differences in the diameters of the forearm arteries： the mean radial artery inner diameter was （3.04±0.43） mm in ethnic Han Chinese and （3.05±0.42） mm in ethnic Zhuang Chinese, P 〉0.05）, the mean ulnar artery inner diameter was （3.03±0.38） mm in Han Chinese and （3.05±0.36） mm in Zhuang Chinese, P 〉0.05）. It was estimated that the inner diameter of the radial artery was not smaller than a 6F Cordis sheath in 86.1% of male patients and in 57.0% of female patients, and not smaller than a 7F Cordis sheath in 59.3% of male patients and 24.9% of female patients. The factors found to positively affect the size of the radial artery were sex （bj=0.309, P 〈0.01）, weight （bj=0.103, P 〈0.01 ）, and diabetes mellitus （bj=-0.088, P 〈0.01） was found to negatively affect radial a

关键词： radial artery ulnar artery variation interventional therapy coronary heart disease

Geology and mineralization of the Dayin’gezhuang supergiant gold deposit(180 t)in the Jiaodong Peninsula,China:A review

在线全文

学校读者我要写书评

暂无评论

China Geology 2022年第4期5卷 696-721页

作者： Xiang-dong Liu Zheng-jiang Ding ming-chun Song ming-ling Zhou Shao-hui Xu Zhen-liangYang Tian-ci Xie Tao Cui Ying-xin Song Xue-kan gao Rui-xiang Li Liang-liang Zhang Qi-bin Zhang Shan-shan Wang Bin Wang No.6 Geological Team of Shandong Provincial Bureau of Geology and Mineral Resources Weihai 264209China Ministry of Natural Resources Technology Innovation Center for Deep Gold Resources Exploration and Mining Weihai 264209China State Key Laboratory of Geological Process and Mineral Resources China University of Geosciences(Beijing)Beijing 100083China Hebei Key Laboratory of Strategic Critical Mineral Resources Hebei GEO UniversityShijiazhuang 050031China Shandong Institute of Geological Sciences Jinan 250013China Dayin’gezhuang Gold Company Zhaojin Mining Co.Ltd.Zhaoyuan 264000China

The Dayin’gezhuang gold deposit is located in the central part of the Zhaoping Fault metallogenic belt in the Jiaodong gold province-the world’s third-largest gold metallogenic *** is a typical successful case of prospecting at a depth of 500-2000 m in recent years,with cumulative proven gold resources exceeding 180 *** main orebodies(No.1 and No.2 orebody)generally have a pitch direction of NNE and a plunge direction of *** the ore-controlling fault,the Zhaoping Fault is a shovel-shaped stepped fault,with its dip angle presenting stepped high-to-low transitions at the elevation of -2000-0 *** gold mineralization enrichment area is mainly distributed in the step parts where the fault plane changes from steeply to gently,forming a stepped metallogenic pattern from shallow to *** can be concluded from previous studies that the gold mineralization of the Dayin’gezhuang gold deposit occurred at about 120 *** ore-forming fluids were H_(2)O-CO_(2)-NaCl-type hydrothermal solutions with a medium-low temperature and medium-low *** H-O isotopic characteristics indicate that the fluids in the early ore-forming stage were possibly magmatic water or mantle water and that meteoric water gradually entered the ore-forming fluids in the late ore-forming *** S and Pb isotopes indicate that the ore-forming materials mainly originate from the lower crust and contain a small quantity of mantle-derived *** comprehensive analysis shows that the Dayin’gezhuang gold deposit was formed by thermal uplifting-extensional *** strong crust-mantle interactions,large-scale magmatism,and the material exchange arising from the transformation from adakitic granites to arc granites and from the ancient lower crust to the juvenile lower crust during the Early Cretaceous provided abundant fluids and material sources for ***,the detachment faults formed by the rapid magmatic uplift and the extensional tectonism created favorable tem

关键词： Stepped metallogenic model Thermal uplifting-extension mineralization Geological characteristics Supergiant gold deposit Zhaoping metallogenic belt Jiaodong gold province Mineral exploration engineering Dayin’gezhuang Shandong Province China

Three-dimensional mapping of intertrochanteric fracture lines

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2019年第21期132卷 2524-2533页

作者： ming Li Zhi-Rui Li Jian-Tao Li ming-Xing Lei Xiu-Yun Su Guo-Qi Wang Hao Zhang gao-Xiang Xu Peng Yin Li-Cheng Zhang Pei-Fu Tang Department of Orthopaedics Chinese PLA General HospitalBeijing 100853China Department of Orthopaedics Hainan Branch of Chinese PLA General HospitalSanyaHainan 572013China Department of Pediatrics Chinese PLA General HospitalBeijing 100853China Department of Orthopedics Beijing Chaoyang HospitalCapital Medical UniversityBeijing 100020China.

Background:Available research about the anatomic patterns of intertrochanteric fractures is lacking,and fracture mapping has not previously been performed on intertrochanteric *** study aimed to determine the major trajectories of intertrochanteric fracture lines using computed tomography data from a series of surgically treated ***:In this study,504 patients with intertrochanteric fractures were retrospectively *** patterns were graded according to Arbeitsgemeinschaft für Osteosynthesefragen(AO)*** lines were transcribed onto proximal femoral templates and graphically superimposed to create a compilation of fracture maps that were subsequently divided into anterior,posterior,lateral,and medial fracture maps to create a three-dimensional(3D)pattern by reducing fragments in the 3D *** fracture maps were then converted into frequency *** major fracture patterns were assessed by focusing on the lateral femoral wall,lesser trochanter,intertrochanteric crest,and inner cortical ***:Anterior,posterior,lateral,and medial fracture maps were *** majority of fracture lines(85.9%,433/504)on the anterior maps were along the intertrochanteric line where the iliofemoral ligament was *** the medial plane,the majority of fracture lines(49.0%,247/504)shown on the frequency spectrum included the turning point involving the third *** the posterior plane,the majority of fracture lines(52.0%,262/504)involved the intertrochanteric crest from the greater to the lesser *** the lateral plane,the majority of fracture lines(62.7%,316/504)involved the greater trochanter at the gluteus medius ***:The fracture patterns observed in the present study might be used to describe morphologic characteristics and aid with management *** classifications or modifications that incorporate the fracture patterns identified in this study may be used in future

关键词： Intertrochanteric fracture Fracture pattern Frequency spectra Computed tomography data Classification

Ni(110)-p2mg(2×1)-CO表面的几何结构和电子态

在线全文

学校读者我要写书评

暂无评论

物理化学学报 2009年第11期25卷 2305-2311页

作者：赵新新陶向明宓一鸣陈戍谭明秋上海工程技术大学基础教学学院上海201620 浙江大学物理系杭州310027

利用密度泛函理论(DFT)总能计算研究了Ni(110)-p2mg(2×1)-CO表面的原子结构和电子态.计算结果表明:CO分子吸附于该表面的短桥位附近,分子吸附能为1.753eV,CO分子的键长dC—O为0.117nm,分子与表面竖直方向的夹角为20.0°,碳原子和短桥... 详细信息

利用密度泛函理论(DFT)总能计算研究了Ni(110)-p2mg(2×1)-CO表面的原子结构和电子态.计算结果表明:CO分子吸附于该表面的短桥位附近,分子吸附能为1.753eV,CO分子的键长dC—O为0.117nm,分子与表面竖直方向的夹角为20.0°,碳原子和短桥位中点的连线与竖直方向的夹角为20.9°;吸附的CO分子内原子间的伸缩振动频率为1876和1803cm-1.态密度研究结果表明吸附作用主要来自CO分子π、σ轨道与衬底d轨道间的杂化作用.CO分子σ轨道和衬底表面镍原子dxz轨道杂化形成的表面电子态主要位于费米能以下-10.4至-8.8eV和-7.4至-5.1eV范围内.σ和dxz轨道间的杂化作用可能是形成p2mg表面对称性的重要因素之一.

关键词：密度泛函理论 Ni(110)-p2mg(2×1)-CO 吸附能分子振动态密度

Genetic analysis and functional identification of tetrahydrobiopterin synthesis-related silkworm mutants

在线全文

学校读者我要写书评

暂无评论

Genetic analysis and functional identification of tetrahydro...